It's not like people can arbitrarily choose their own loss function; our drivers, needs and desires are what they are, you don't get to just redefine what makes

It's not like people can arbitrarily choose their own loss function; our drivers, needs and desires are what they are, you don't get to just redefine what makes you happy (otherwise clinical depression would not be a thing); they change over time and can be affected by various factors (things like heroin or brain injury can adjust your loss function) but it's not something within our conscious control. So I would not put that as a distinguishing factor between us and machines.